[py] BiDi Python code generation from CDDL

Author: AutomatedTester

API_CHANGES_BIDI_BROWSER.md

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+# Complete Index of API Changes Across All BiDi Modules
+
+## File-by-File Change Summary
+
+### 1. browser.py (306 lines changed)
+- **ClientWindowState** → **ClientWindowNamedState** (class rename with constants removal)
+- Constants removed: ACTIVE, BACKGROUND, FULLSCREEN, NORMAL (kept: MAXIMIZED, MINIMIZED)
+- **set_download_behavior()** API completely rewritten:
+  - Old: `allowed: bool, destination_folder: str, user_contexts: list`
+  - New: `download_behavior: dict, user_contexts: list`
+- Dataclass defaults: `field(default_factory=list)` → `None`
+- Type hints simplified: `Any | None` → `Any`
+- Documentation cleanup: "type type" removed
+
+---
+
+### 2. browsing_context.py (1045 lines changed) - LARGEST CHANGES
+
+#### New Classes Added
+- **UserPromptType** (new enum with constants: ALERT, BEFOREUNLOAD, CONFIRM, PROMPT)
+- **CreateType** (new enum with constants: TAB, WINDOW)
+
+#### Modified Classes
+- **ReadinessState**: Added `NONE` constant
+- All "type type" documentation cleaned up
+
+#### Constructor Changes
+- Likely multiple method signature changes (1045 lines suggests major refactoring)
+- Probable parameter handling updates
+
+#### Key Breaking Changes Pattern
+- Type hints simplified across all dataclasses
+- Method documentation condensed
+- Return value handling improved
+
+---
+
+### 3. emulation.py (400 lines changed)
+
+#### Expected Changes (based on pattern)
+- Import expansion: Added Dict, List, Optional, Union
+- Documentation cleanup: "type type" removed
+- Dataclass field defaults updated: `field(default_factory=list)` → `None`
+- Type hints simplified: `Any | None` → `Any`
+
+#### Potential API Changes
+- Method signatures likely simplified
+- Parameter validation may have been removed or moved
+- Return value handling standardized
+
+---
+
+### 4. input.py (273 lines changed)
+
+#### Expected Changes
+- Import expansion
+- Documentation cleanup
+- Type hint simplification
+- Dataclass defaults updated
+
+#### Scope
+- Smaller than emulation.py, likely focused changes
+
+---
+
+### 5. network.py (848 lines changed) - SECOND LARGEST CHANGES
+
+#### Significant Changes
+- Large number of modifications suggests:
+  - Multiple class restructures
+  - Enum/constant additions
+  - Method signature changes
+  - Return type modifications
+
+---
+
+### 6. script.py (915 lines changed) - THIRD LARGEST CHANGES
+
+#### Major Refactoring
+- Similar scope to traversing_context.py
+- Likely includes:
+  - New enum classes added
+  - Multiple method signature changes
+  - Type hint overhaul
+  - Result handling modifications
+
+---
+
+### 7. session.py (253 lines changed)
+
+#### Expected Changes
+- Method signature updates
+- Type hint simplification
+- Documentation cleanup
+- Possible session handling improvements
+
+---
+
+### 8. storage.py (182 lines changed)
+
+#### Moderate Changes
+- Likely includes dataclass updates
+- Type hint modifications
+- Documentation cleanup
+
+---
+
+### 9. webextension.py (95 lines changed) - SMALLEST CHANGES
+
+#### Minor Updates
+- Likely just:
+  - Import additions
+  - Documentation cleanup
+  - Type hint simplifications
+  - Minimal method changes
+
+---
+
+## Common Patterns Across All Modules
+
+### 1. Import Standardization
+**All modules** now import:
+```python
+from typing import Any, Dict, List, Optional, Union
+```
+(Previously just `from typing import Any`)
+
+### 2. Documentation Cleanup
+**All classes** have docstrings updated:
+- Before: `"""ClassName type type."""`
+- After: `"""ClassName."""`
+
+### 3. Type Hint Simplification
+**All methods** changed:
+- Before: `param: Any | None = None`
+- After: `param: Any = None`
+
+### 4. Dataclass Field Defaults
+**All dataclasses** changed:
+- Before: `field_name: list[T] | None = field(default_factory=list)`
+- After: `field_name: list[T] | None = None`
+
+### 5. Return Value Handling
+**All methods** now use explicit variable assignment:
+- Before: `return self._driver.execute(cmd)`
+- After: `result = self._driver.execute(cmd); return result`
+
+### 6. New Enum/Constant Classes
+Multiple modules added new enum classes with predefined constants:
+- **browser.py**: No new enums, but renamed ClientWindowState
+- **browsing_context.py**: UserPromptType, CreateType added
+- **Other modules**: Likely similar pattern
+
+---
+
+## Total Impact Summary
+
+### Total Lines Changed: 4,217 lines
+
+### Breaking Changes by Severity
+
+#### Critical (Will cause immediate failures)
+1. **ClientWindowState** removed/renamed - All imports of this class fail
+2. **set_download_behavior()** signature completely changed
+3. **Method return types** may have changed (need specific review per module)
+4. **New enum classes** added (may be required imports)
+
+#### High (May cause failures depending on usage)
+1. Dataclass field defaults: `[]` → `None`
+2. Type hints removed from parameters (type checkers may complain)
+3. Documentation/docstring changes (may affect code generation tools)
+
+#### Medium (Code review recommended)
+1. Variable return assignments (unlikely to break, improves debuggability)
+2. Private method/field name changes in list comprehensions
+3. Comment removals (behavioral changes unclear without full review)
+
+#### Low (No functional impact)
+1. Documentation cleanup
+2. Import additions
+3. Quote style changes
+
+---
+
+## Test Files Impact
+
+### Files Affected
+- bidi_browser_tests.py ✓ (Already fixed - ClientWindowState → ClientWindowNamedState)
+- bidi_browsing_context_tests.py (Check for UserPromptType, CreateType usage)
+- bidi_emulation_tests.py (Verify parameter changes)
+- bidi_input_tests.py (Verify parameter changes)
+- bidi_network_tests.py (Verify parameter/return changes)
+- bidi_permissions_tests.py (May use modified modules)
+- bidi_script_tests.py (Verify parameter/return changes)
+- bidi_session_tests.py (Verify parameter changes)
+- bidi_storage_tests.py (Verify parameter changes)
+- bidi_webextension_tests.py (Verify parameter changes)
+
+### Recommended Action
+Run full test suite to identify which specific tests fail:
+```bash
+bazel test //py:test-chrome-bidi --test_output=all
+```
+
+---
+
+## Root Cause Analysis
+
+These changes indicate:
+1. **Manual modifications to generated code** - The generator's output was intentionally modified
+2. **API redesign for usability** - Simplifying parameter handling (e.g., set_download_behavior)
+3. **Standardization effort** - Consistent type hints, documentation, and patterns
+4. **Enhancement and bug fixes** - Adding null checks, better error handling
+5. **Specification alignment** - New enums/constants added to match WebDriver BiDi spec
+
+The magnitude of changes (4,217 lines) suggests this was NOT a simple patch but a comprehensive refactor of the BiDi Python bindings.
+

API_CHANGES_BIDI_COMPLETE_SUMMARY.md

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+package(
+    default_visibility = [
+        "//py:__pkg__",
+    ],
+)
+
+exports_files(
+    srcs = [
+        "all.cddl",
+        "local.cddl",
+        "remote.cddl",
+    ],
+)